08 ford expedition air suspension problems

SOURCE: air ride suspension 1997 ford expedition

If the compressor is working and actually pumping out air, might need to check your lines dont have a leak by disconnecting them from the bags. If pressured air is making it to the end of the line, then bags may need to be inspected and one or both replaced. However it is more likely that the lines are leaking or the compressor pump needs a service. Just a new set of rings in the unit. Good luck, hope it helps.

SOURCE: 2001 Ford Expedition XLT EB rear air bag suspension does not inflat

Sounds like the seals may have failed in the air shocks themselves. I also think you may have a bleeder valve problem. Follow the lines back and check the bleeder valve to see if it is leaking when you have someone else turn the vehicle on.

SOURCE: Rear suspension on 1998 Ford EXP wont raise

More than likely you have an inner leak in one of the strut assem. in rear.

SOURCE: rear air suspension is not at level left is higher than the right

I have the exact same problem but my Left side is "Lower" than the right side.... Go Figure, Let's switch Solenoid's... Lol. I haven't seen a fix for this yet... there is 1 ride height sensor bolted to the rear but it's for both sides. the following site seems to be recommended by most Expo owners on all of the ford forums.. Check them out.
http://www.suncoreindustries.com/english-ford-expedition-97-02-air-suspension.html

SOURCE: how to change rear air suspension on 1999 ford

The air suspension can be a tricky thing to mess with. When we were looking to replace just one of the rear bags it was going to be costly. My husband did some checking around online and found Strutmasters.com.
They offered great products at a great price and we were very pleased with the outcome of the replacement of the non air system. If you are replacing the entire system you are looking at a pretty penny. I would check Strutmasters out before you replace the air on your Expedition.